278455683720 has 64 divisors (see below), whose sum is σ = 843477448320. Its totient is φ = 73533924864.

The previous prime is 278455683713. The next prime is 278455683721. The reversal of 278455683720 is 27386554872.

It is not an unprimeable number, because it can be changed into a prime (278455683721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11252029 + ... + 11276748.

It is an arithmetic number, because the mean of its divisors is an integer number (13179335130).

Almost surely, 2^278455683720 is an apocalyptic number.

278455683720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278455683720 is an abundant number, since it is smaller than the sum of its proper divisors (565021764600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278455683720 is a wasteful number, since it uses less digits than its factorization.

278455683720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22528894 (or 22528890 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 57.

The spelling of 278455683720 in words is "two hundred seventy-eight billion, four hundred fifty-five million, six hundred eighty-three thousand, seven hundred twenty".